REVIEW

a) System.out.println(num+" "+cost);

b) In Permutations, the order matters. So ABC would be one permutation and ACB would be another, for example. Now, there are 6 (3 factorial) permutations of ABC.

name1 = stdin.next();
name2 = stdin.next();
name3 = stdin.next();

System.out.println(name1 + ", " + name2 + ", and " + name3);
System.out.println(name1 + ", " + name3 + ", and " + name2);
System.out.println(name2 + ", " + name1 + ", and " + name3);
System.out.println(name2 + ", " + name3 + ", and " + name1);
System.out.println(name3 + ", " + name2 + ", and " + name1);
System.out.println(name3 + ", " + name1 + ", and " + name2);